1-Clean up your home screen

If you choose to use live wallpaper then consider replacing it with a good static image. You should also clean away any unused icons and limit your widgets to the essentials. The less cluttered your home screen is, the better in terms of performance.

2-Uninstall and disable unused apps

You don’t want to allow apps that you never use to take up space on your device and potentially eat into system resources. Go to Settings > Apps and swipe over to the All tab. Take a good long look down the list and identify the apps you don’t want or need. If you’re in doubt about what any of them do then it’s time to hit Google and check.Tap on any app you don’t want and then choose Uninstall or, if the option is not there to uninstall, tap Disable. Disabled apps will be listed in a new tab, so you can always enable them again in future if you change your mind.You should also take a look in Settings > Apps at the Running tab. Some apps want to be running all the time and they can seriously impact on performance. Think carefully about whether you need what’s listed there.

3-Try a third-party launcher

Some of the customizations that OEMs make to their devices can be heavy-handed. If you want to change the feel of navigating around, and tweak some settings to make it feel speedier, then you might find that a third-party launcher does the trick. Try out something like Nova Launcher, Go Launcher EX,APUS Launcher or Apex Launcher. Experiment with the settings and you should find that your device feels a lot faster.

4-Overclock your Ace II

One of the reasons you’ll see differences in performance between Android devices with essentially the same processors, is that some OEMs limit speed in order to reduce heat and extend battery life. If you’re willing to root your Android device then you can overclock it using an app like SetCPU,NO-frills CPU control or Android Overclock. It’s wise to proceed with caution if you do decide to do this.Install a custom ROMRooting your Android device doesn’t automatically offer any performance improvements, but a custom ROM can. For some devices that are no longer being updated custom ROMs are a way of getting a newer version of Android. You can also find custom ROMs that dispense with bloatware entirely and offer some interesting tweaks and modifications. You’ll need to do some research to find the right custom ROM for you.